Heats of adsorption in the mixed polymer systems

Energy of adsorption interaction and surface coverage from polymer of various molecular structures

“…Above described process explains diminishing of adsorption and, accordingly, the energy of adsorption interaction in the ternary systems as compared with the binary systems polymer-solvent (Table 1). Similar results were obtained by us earlier at determination of the adsorption interaction energy and the heat of adsorption for the system PS-PBMA-CCl 4 [26]; these parameters were considerably less in the case of adsorption from the mixtures of polymers, than that in the case of adsorption from binary solutions.…”

The influence of the adsorbent amount on the changes in molecular mass distribution of polymers under adsorption from mixtures

“…Taking into consideration the literature data [24] and our recent results [25] on the estimation of the interaction of the same polymers with the adsorbent surface under the adsorption from the binary and ternary solutions, it is clear that PBMA and PS have different energies of adsorption interaction. Polar PBMA has a greater affinity to the adsorbent surface and adsorption interaction is governed by the creation of hydrogen bonds between the oxygen of the ether groups and the C groups on the adsorbent surface.…”

“…Adsorption interaction of PS is realized by means of dispersion forces arising under the interaction between the π -e aromatic nucleus and free OH-groups of silica. The energy of interaction is equal to 15-16 kJ/mol [25].…”

Atomic Force and Ultrasonic Force Microscopy Investigation of Adsorbed Layers Formed by Two Incompatible Polymers: Polystyrene and Poly(butyl methacrylate)

“…These clusters can pass almost unchanged to the adsorbent surface and therefore determine the structure of the adsorption layer. The dimensions of the molecular adsorption coils are in the range of several tens of nanometers, whereas the cluster dimensions are in the range of 40−300 nm . These molecular and supramolecular dimensions predetermine the formation of nanoscale adsorption layers.…”

“…Nanoscale adsorption layers can also be produced by adsorption from mixed polymer systems. A detailed description of the adsorption in mixed systems is given in ref . Of special interest are the adsorption layers formed by two different polymers in the course of simultaneous competitive adsorption .…”